<!-- Button group in different varients -->
<div class="btn-group">	
    <button class="btn pmd-btn-raised pmd-ripple-effect btn-default" type="button">4</button>
    <button class="btn pmd-btn-raised pmd-ripple-effect btn-info" type="button">5</button>
    <button class="btn pmd-btn-raised pmd-ripple-effect btn-warning" type="button">6</button>	
</div>